[Reikou]

When you force a Youkai to target any random mob by click-dragging him onto it the AI will start behaving strangely, such as:

Not moving or attacking if the target is out of range but there's something else in range.
Attacking whatever target they want when both the target and other mobs are in range.

Or at least that's how I think they're behaving right now after my limited testing. I'd also like to point out that the feature used to work properly when I last tested it a few years ago.

Youkais I've seen behave this way: Upgraded Seiryuu, Upgraded Suzaku.